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Erschienen in: Wireless Personal Communications 4/2019

02.04.2019

Channel Estimation in Massive MIMO Systems Using a Modified Bayes-GMM Method

verfasst von: Pan Su, Yang Wang

Erschienen in: Wireless Personal Communications | Ausgabe 4/2019

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Abstract

In this paper, we study the uplink channel estimation based on machine learning algorithm in massive MIMO systems. Based on the sparsity of channel gains in the beam domain, we use Gaussian mixture model (GMM) to model the channel. The expectation maximization (EM) algorithm is adopted to obtain the parameters of GMM. Bayesian algorithm is used to estimate the channel gains. The approximate message passing (AMP) algorithm is used to solve the multiple integrals in Bayesian estimation algorithm to reduce the computational load. When determining the initial values of AMP and EM algorithms, the hierarchical clustering algorithm is adopted to improve the mean square error (MSE) and convergence performance of the algorithm. Simulation results show that the performance of the proposed algorithm is better than that of the traditional least square (LS) algorithm and the existing Bayes-GMM algorithm.

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Metadaten
Titel
Channel Estimation in Massive MIMO Systems Using a Modified Bayes-GMM Method
verfasst von
Pan Su
Yang Wang
Publikationsdatum
02.04.2019
Verlag
Springer US
Erschienen in
Wireless Personal Communications / Ausgabe 4/2019
Print ISSN: 0929-6212
Elektronische ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-019-06339-5

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